Degree of Conversion Contributes to Dentin Bonding Durability of Contemporary Universal Adhesives

Tichý, Antonín; Hosaka, Keiichi; Abdou, Ahmed; Nakajima, Masatoshi; Tagami, Junji

doi:10.2341/19-165-l

Cited by 30 publications

(18 citation statements)

References 39 publications

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“…This is corroborated by Inokoshi et al [28] (initial curing characteristics of composite cements under ceramic restorations), who confirmed that the conversion degree is mainly dependent on the composition of the luting cement itself, with Panavia V5 showing a statistically higher conversion rate than other cements therefore possibly leading to higher bond strength values. Therefore, higher conversion values led to significantly higher mechanical properties and, in particular, to higher µTBS [29].…”

Section: Discussionmentioning

confidence: 98%

Bond Strength Stability of Different Dual-Curing Adhesive Cements towards CAD-CAM Resin Nanoceramic: An In Vitro Study

et al. 2021

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Background: To evaluate different adhesive luting procedures on coronal dentin bond-strength of Cerasmart CAD-CAM blocks with μTBS test. Methods: 36 molar crowns were flattened in order to expose sound dentin and a standardized smear layer was created with 600 grit paper. Specimens were divided into six groups according to the luting cement employed (n = 12 each): G1: Panavia V5 (Kuraray, Japan); G2: Bifix QM (Voco, Germany); G3: Estecem (Tokuyama, Japan). CAD-CAM blocks (Cerasmart, GC), shade A2LT, size 14, were sectioned with a diamond saw to obtain 4 mm high specimens, which were then luted on the coronal dentin, following the manufacturer instructions. Specimens were serially sectioned to obtain 1 mm thick beams in accordance with the μTBS test technique. Half of the beams were stressed to failure after 24 h (t = 0), while the other half were stored in artificial saliva for 12 months, at 37 °C, for ageing before stressing to failure (t = 12). Results: two-way ANOVA test showed significant difference for the factor “luting cement” (p = 0.0002), while the factor “time of storage” (p = 0.0991) had no significant effect on µTBS. Conclusions: PanaviaV5 seems to have better µTBS values at T0 than QM and ES and 1 year aging doesn’t seem to affect the bonding strength of tested systems.

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Section: Discussionmentioning

confidence: 98%

Bond Strength Stability of Different Dual-Curing Adhesive Cements towards CAD-CAM Resin Nanoceramic: An In Vitro Study

et al. 2021

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“…It is noteworthy that while the pretreatment with sulfinate agents led to significant differences in μTBS compared to the pretreatment with ethanol and the mixture of sulfinate agents with corresponding 1-SEAs, their DC was statistically similar. This discrepancy can be attributed to the fact that the penetration depth of ATR-FTIR is around 3 μm 23) , corresponding to approximately the top third of the adhesive layer of UBQ (8-10 μm in SE mode, 10-12 μm in ER mode) and SBU (8-10 μm in both modes) 26) . Since dentin pretreatment with sulfinate agents would presumably affect mainly the hybrid layer and the basal part of the adhesive layer, ATR-FTIR might be unable to fully detect the effect of the pretreatment.…”

Section: Discussionmentioning

confidence: 99%

“…The results showed no appreciable difference between the regions, suggesting that the substrate does not directly affect the spectra. This is presumably due to the fact that the penetration depth of mid-infrared light used for the analysis is only around 3 μm 23) which corresponds to approximately one third of the 1-SEAs' adhesive layer 26) . Therefore, in order to save human teeth and bovine crowns for other experiments, sixty-four roots of sound bovine incisors were used for the measuring of DC.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…The adhesives' DC is an important factor for bond strength to dentin 22) . A recent study revealed that the DC of contemporary 1-SEAs was positively correlated with their micro-tensile bond strength (μTBS) to dentin, especially after thermocycling 23) . The higher DC also increases the adhesives' resistance to water sorption and improves the initial bond strength as well as the durability of the resin-dentin bond 24) .…”

Section: Introductionmentioning

confidence: 99%

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Degree of conversion and dentin bond strength of light-cured multi-mode adhesives pretreated or mixed with sulfinate agents

et al. 2021

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The influence of sulfinate agents applied as a dentin pretreatment or a mixture with multi-mode one-step self-etch adhesives (1-SEAs) on the degree of conversion (DC) and micro-tensile bond strength (μTBS) of light-cured 1-SEAs was investigated. 1-SEAs Clearfil Universal Bond Quick (UBQ) or Scotchbond Universal Adhesive (SBU) were applied to dentin in etch&rinse or self-etch mode using various application strategies: 1) no pretreatment, 2) pretreatment with 90 wt% ethanol, 3) pretreatment with a sulfinate agent Clearfil DC Activator (UDC) or Scotchbond Universal DCA (SDC), or 4) a mixture of UBQ+UDC or SBU+SDC. μTBS was measured after 24 h. Additionally, DC was measured using attenuated total reflectance Fourier-transform infrared spectroscopy. Pretreatment with sulfinate agents resulted in the highest μTBS and DC, significantly improving them especially in etch&rinse mode. The mixture of sulfinate agents with 1-SEAs was less effective. Pretreatment with ethanol significantly improved μTBS in etch&rinse mode but compromised μTBS in self-etch mode.

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“…As the combined pretreatment with NaOCl and STS is relatively time-consuming, easy-to-use universal adhesives were employed in this study so that the procedure was not excessively technique-sensitive. In addition, universal adhesives are increasingly popular among clinicians, and recent studies suggest that their durability may have improved [29][30][31][32]. The null hypothesis tested in this study was that the deproteinization using NaOCl and application of STS would not affect the bonding performance of universal adhesives to eroded dentin.…”

Section: Introductionmentioning

confidence: 87%

Sodium p-Toluenesulfinate Enhances the Bonding Durability of Universal Adhesives on Deproteinized Eroded Dentin

et al. 2021

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The effects of deproteinization using sodium hypochlorite (NaOCl) and the subsequent application of an antioxidant (sodium p-toluenesulfinate, STS) onto the bonding durability of universal adhesives on eroded dentin were investigated. Untreated sound dentin served as the control, whereas eroded dentin, which had been prepared by pH-cycling in 1% citric acid and a remineralization solution, was either untreated, deproteinized with a 10% NaOCl gel or deproteinized with the 10% NaOCl gel and subsequently treated with an STS-containing agent. The dentin surfaces were bonded using a universal adhesive (Clearfil Universal Bond Quick, Scotchbond Universal or G-Premio Bond), and the micro-tensile bond strength (µTBS) test was performed after 24 h or 10,000 thermal cycles. The µTBS data were statistically analyzed using a three-way ANOVA and Tukey’s HSD post hoc tests. The lowest µTBS was measured on untreated eroded dentin (p < 0.001). Deproteinization of eroded dentin resulted in µTBS similar to untreated sound dentin (p > 0.05), but the highest µTBS was obtained if deproteinization was followed by the application of STS. Thermocycling significantly decreased µTBS in all groups (p < 0.001), except for STS-treated deproteinized eroded dentin (p > 0.05). This indicated that deproteinization, followed by the application of STS, could enhance the bonding durability of universal adhesives on eroded dentin.

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Degree of Conversion Contributes to Dentin Bonding Durability of Contemporary Universal Adhesives

Abstract: Clinical Relevance The degree of conversion of contemporary universal adhesives positively correlates with the bond strength to dentin. The correlation is more marked after thermocycling, suggesting that a high degree of conversion is required for long-term dentin bonding durability.

Cited by 30 publications

References 39 publications

Bond Strength Stability of Different Dual-Curing Adhesive Cements towards CAD-CAM Resin Nanoceramic: An In Vitro Study

Bond Strength Stability of Different Dual-Curing Adhesive Cements towards CAD-CAM Resin Nanoceramic: An In Vitro Study

Degree of conversion and dentin bond strength of light-cured multi-mode adhesives pretreated or mixed with sulfinate agents

Sodium p-Toluenesulfinate Enhances the Bonding Durability of Universal Adhesives on Deproteinized Eroded Dentin

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